If that email is authentic, Patrick Sawyer knew his sister was infected with Ebola and deliberately lied to the authorities when confronted at the airport in Nigeria. Now, in one of the interviews, the gentleman that cleared him for travel did say that Sawyer asked for a blood test and that the “test did not come back positive”. So, perhaps it was another one of those false-negatives.
In any case, he was like the figure of Death, walking around with a giant sickle. *shudder*
And he knew he’d had contact with her blood just before she died.
Either deep denial or malice. I lean more towards the first but I can make a rudimentary argument for the second if I try hard enough.